UPF 50+ Wesley Swim Trunks: Our popular swim trunks feature a built-in mesh liner, waist drawcord, and custom Flap Happy prints which your lil' man will love! Not only are they fun and stylish, but they are also UPF 50+, the highest rating in the UPF classification system. Mix n match with coordinating Flap Happy UPF 50+ rash guards and UPF 50+ hats for maximum sun protection. Great for the pool, the beach, or any outdoor play! With three decades of experience protecting kids from the sun, you can have the utmost confidence in your Flap Happy products.